Battery for a mobile phone



FIG. 1 is a perspective view from the front, top and right side of a battery for a mobile phone showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof (the right side being a mirror image thereof);

FIG. 5 is a top plane view thereof; and,

FIG. 6 is a bottom plane view thereof. 

The ornamental design for a battery for a mobile phone, as shown and described. 